#include <stdio.h>
#include "math.h"

int main(int argc, char* argv[]) {

  printf("%d + %d = %d\n", 100, 200, add(100, 200));
  printf("%d - %d = %d\n", 400, 200, sub(400, 200));
  printf("%d! = %d\n", 10, fact(10));
  printf("%d^%d = %d\n", 10, 2, power(10, 2));

  return 0;
}
